What Is a Reticule?
A reticule, also known as a reticle or graticule, is a fine pattern of lines or markings found in optical instruments such as microscopes, telescopes, or lensometers. It helps users measure, align, or focus on specific points within the field of view. In eye care, reticules are used in diagnostic tools to check alignment and accuracy. They make vision testing and lens calibration more precise.
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